新疆吉木萨尔页岩油藏压裂水平井 压裂簇数优化研究.

Shale reservoirs have very low original permeability and n o economic productivity under natural conditions. Practice shows that large hydraulic fracturing is the most effective means to develop shale reservoirs efficiently. However, there are few reports on the optimization of fracture cluster number in fractured horizontal w ells in shale reservoirs. In view of this problem, the multi-well numerical model of multi-stage fractured horizontal wells is established b y u sing the unstable seepage theory, and a set of optimization method of fracture cluster number of multi-stage fractured horizontal wells in shale reservoir is put forward on the principle of full utilization of reserves. The results show that when the number of fracture clusters in multi-stage fractured horizontal wells in Changji oilfield is more than 80,the cumulative increase trend of oil production tends to be flat. It can be determined that the reasonable cluster spacing range is about 15~20 m, and the number of fracture clusters is 70~ 80. According to the theoretical model with an optimal number of fracture clusters of 75,the cumulative oil production of fractured horizontal wells in shale reservoirs in Changji oilfield was calculated and found to be 25 150 m3 • This work can provide theoretical reference for the design of fracture clusters in fractured horizontal wells in shale reservoirs in Changji oilfield, Xinjiang. [ABSTRACT FROM AUTHOR]